[RFC 0/4] drivers: footprint reduction proposal

[Tom Rini <trini@konsulko.com>]

On Mon, Jun 22, 2020 at 11:12:40AM -0300, Walter Lozano wrote:
> Hi Tom,
> 
> On 19/6/20 18:48, Tom Rini wrote:
> > On Fri, Jun 19, 2020 at 06:11:36PM -0300, Walter Lozano wrote:
> > 
> > > Based on several reports and discussions it is clear that U-Boot's
> > > footprint is always a concern, and any kind of reduction is an
> > > improvement.
> > > 
> > > This series is a proposal to  help reducing the footprint by parsing
> > > information provided in DT and drivers in different ways and adding
> > > additional intelligence to dtoc. The current version implements the basic
> > > functionality in dtoc but this is no fully integrated, however it will allow
> > > us to discuss this approach.
> > > 
> > > Firstly, based on the compatible strings found in drivers, include only DT nodes
> > > which are supported by any driver present in U-Boot.
> > > 
> > > Secondly, generate struct udevice_id entries only for nodes present in DT,
> > > which will allow to avoid including additional data.
> > > 
> > > These are the first steps for further improvements as proposed in the specific
> > > patches in this series.
> > > 
> > > This work is based on the work of Simon Glass present in [1] which adds
> > > support to dtoc for parsing compatible strings.
> > > 
> > > [1] https://gitlab.denx.de/u-boot/custodians/u-boot-dm/-/tree/dtoc-working
> > I applied this series on top of the above tree, but there's no rule for
> > <generated/compatible.h> so is something missing?  Thanks!
> > 
> Thanks for taking the time to check this RFC.
> 
> As you pointed, the Makefile needs to be tweaked in order to be able to run
> a build, that is what I meant by "not fully integrated", also some
> additional stuff are missing. However, I thought that sending this RFC
> explaining the idea will be nice in order to confirm if the approaches
> proposed make sense for the community and at least the one to handle
> compatible strings is different from the linker list suggestion.

I think I like the idea, but I need to give a build a spin and poke
things harder.  What do I need to do to manually have this build+link?
Thanks!

-- 
Tom
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